Long Way Up (2020)

S35E28 The Dexter Killer

Dive deep into the psyche of Mark Twitchell, a man accused of murder who idolized the fictional killer Dexter. Newly uncovered letters shed light on his disturbing fantasies and motivations. “48 Hours” contributor Troy Roberts investigates this chilling case, exploring Twitchell's obsession and the dark parallels between reality and fiction.